742627409 has 2 divisors, whose sum is σ = 742627410. Its totient is φ = 742627408.

The previous prime is 742627387. The next prime is 742627429. The reversal of 742627409 is 904726247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378886225 + 363741184 = 19465^2 + 19072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742627409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742627429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371313704 + 371313705.

It is an arithmetic number, because the mean of its divisors is an integer number (371313705).

Almost surely, 2^742627409 is an apocalyptic number.

It is an amenable number.

742627409 is a deficient number, since it is larger than the sum of its proper divisors (1).

742627409 is an equidigital number, since it uses as much as digits as its factorization.

742627409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 742627409 is about 27251.1909648001. The cubic root of 742627409 is about 905.5734017674.

The spelling of 742627409 in words is "seven hundred forty-two million, six hundred twenty-seven thousand, four hundred nine".